stake. Another method consists of placing a lead-in wire arrestor on the side of the house, just where the lead-in passes through to the radio. Then connect a piece of copper wire between the ground terminal o f the arrestor and a ground stake.
L i g h t n i n g P r o t e c t i o n An antenna which rises above all surrounding objfects may build up a charge o f static electricity. To drain off this charge, connect a piece of heavy copper wire from the antenna mast to a ground
BIOLAHOUR
AND MORE TIPS—
ANTENNA-WISE TIPS! The higher the aerial is in the air,the better. Getit up! An aerial may perform betterat one place than another on your house top.Try outvarious locations. Metal rofs, drainpipes, chimneys andotherreflectingobjectscan spoil reception.Avoid geting too close to them. Do notplace theantenna so any thing can touchit. Avoid swaying branches of trees. Use high-frequency stand-of insu lators to keep the antennalead-in cable clear. The lead-in cable should be sol dered or otherwise curely fastened to theantenna. The lead-in cable should be as short as possible.
Rotatingmechanisms are made which enable you to “point” your aerialbyremotecontrol togetmaxi mumsignalfrom anydirection. Consider wind resistance,ora stif galemay lay your aerial low. Be sureit is solidly mounted. Beforeyouanchoryour antenna to a chimney, be sure it wil withstand the added wind resistance. The outdoor FMaerial should be protected from lightning by ground ing the metal supporting rod. Read carefully the instructions with the receiver before hooking up the aerial. If in doubt— consultyour local radio expert. He probably knows what types of aerials workbest in your community.
* INSPIRING SACRED MUSIC * HEART WARMING TESTIMONIES * SPIRIT-FILLED MESSAGES Heard over a network of especial ly selected stations throughout the United States. Write for a complete log. For a FREE copy of the Biola BROADCASTER . . . write Biola Schools and Colleges, Inc. La Mirada, Calif. 90638 MAY WE PRAY FOR YOUR REQUESTS? Send to Prayer Time, The King's Business maga zine, 13B00 Biola Ave., La Mirada, Calif. 90638 THE PEOPLES GOSPEL HOUR with Canada's only full-time Radio Pastor PERRY F. ROCKWOOD NOW HEARD WEEKLY ON 160 STATIONS and Daily on 18 Stations Heard in California: San Diego-Los Angeles XERB (1090) 2:00 p.m. SanFranciscoKFAX (1100) 10:30 a.m. RiversideKACE (1570 &92.7) 9:00 a.m. “A FAITH MISSIONARY RADIO MINISTRY" FRE SAMPLE monthly magazine THE GOSPEL STANDARD Box 500 Boston, Mass. 02102
Why an FM Antenna FM radio, in contrast to AM radio, operates on the “ line of sight” principle. Instead of following the earth’s con tour as AM radio waves do, FM waves theoretically travel in straight lines — like beams of light. And you’ll want your FM antenna placed as high as possible to intercept these so-called “beams.” The engineering concept of “ frequency” determines the antenna size you need for maximum reception. Frequency, so the engineers tell us, is the number of vibrations in a unit of time. To receive low frequency AM signals you need a relatively long antenna. To receive high frequency FM signals you need only a short length o f antenna, placed at maximum elevation. FM TRANSM ITTER
APRIL, 1969
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